body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh; /* 使body占满整个视口高度 */
}

.flowchart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px; /* Increased space between steps */
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 10px;
}

.circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #4CAF50;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    font-weight: bold;
}

.description {
    border: 3px solid  #4CAF50;
    padding: 10px;
    width: 300px;
    border-radius: 5px;
    background-color: #fff;
}

.description p {
    margin: 0;
    color:#4CAF50;
}

/* Arrow styles */
.arrow {
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 20px solid #4CAF50;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .flowchart {
        gap: 20px;
    }

    .circle {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }

    .description {
        width: 250px;
    }

    .arrow {
        border-top-width: 15px;
    }
}
